The lens turning machines of the company Essilor are reliable, provide high quality and accuracy of lens processing and, when used on a flow-through cooling system and careful operation, do not need frequent maintenance. Essilor Kappa CTD V15 allows easy and trouble-free performing the operation of cutting a groove. The function of the controlled facet enables a specialist to simplify a bit the preparatory stage and control such parameters as depth, width, and position of the groove in the lens, depending on its shape, curvature, and thickness along the edge. Essilor Kappa can also boast of its edge cutting, rim shape modification, demo lenses photographing, small frames scanning, etc. It is available for €9,500.